MOISTURE RETENTION IMPROVING METHOD, MOISTURE RETENTION MATERIAL FOR COSMETIC, AND MOISTURE RETENTION COSMETIC

摘要

To provide a moisture retention improving method in which moisture retention effect in the case of using polyol can be significantly increased, and furthermore, a moisture retention material for cosmetic in which moisture retention is improved comparing to the case of polyol only or the case where polyol and water other than deep sea water are combined, and a moisture retention cosmetic containing the moisture retention material for cosmetic.SOLUTION: In a moisture retention improving method, deep sea water is 30 wt.% or more with respect to the entire moisture retention material, and deep sea water and polyol are used in combination in the weight ratio of 9:1 to 3:7. Preferably, deep sea water is produced by performing ion treatment to raw deep sea water by a reverse osmosis membrane filtering method, an electrodialysis method or an ion-exchange membrane method, and ion selection process is performed to the water to bring the ratio of potassium ion, sodium ion, calcium ion, magnesium ion, and chlorine ion to K:Na:Ca:Mg:Cl=1:30 to 70:10 to 40:40 to 150:200 to 500.SELECTED DRAWING: Figure 1